Random crash while rendering
I had the same problem and I think it's a threading issue.
(AFAIK the render engines are written in C++, so it's not surprising considering threading and memory management in C++ are a PITA).

You should keep your CPU levels to below around 50% for the blender-app.exe process. 
In my case, if I bring down the threads to a max of 4, the scripts run without problems (still using all cores).
Slows it down somewhat, but at least it keeps running...

Something like this in a script file:

cd C:\Program Files\Blender Foundation\Blender
blender -b "your_blender_file.blend" -t 4 -a
pause


Hope it works for you.